compass universal mail client

HiDens Mail Client scales to the most sophisticated communicational needs.

Pegasus Mail is a free, standards-based electronic mail client for multiple users.

si.Mail is a mail client and not cluttering taskbar.

Element Mail is a full featured Windows E-Mail client

Claws Mail is a GTK+ based, lightweight, and fast e-mail client and newsreader.

Vivian Mail - A free mail client for SMTP and POP3-Server.

Standalone Mail client with optional strongest RSA/AES encryption.See website

Koma-Mail is an email client which is very comfortable+has many useful functions

Revolver Mail is an email client, an address book and a calendar.

Thinc-Mail is Thinc Technologies' new email client a direct replacement